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Finding the Fourth Proportional to 210,238.80, 314,839.80 and 139,736.40

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Solution

The fourth proportional to 210,238.80, 314,839.80 and 139,736.40 is: 209,260.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,238.80 : 314,839.80 = 139,736.40 : x
  2. Step 2: Convert to fraction form
    210,238.80/314,839.80 = 139,736.40/x
  3. Step 3: Cross multiply
    210,238.80x = 314,839.80 × 139,736.40
  4. Step 4: Simplify right side
    210,238.80x = 43,994,580,228.72
  5. Step 5: Solve for x
    x = 43,994,580,228.72/210,238.80
  6. Step 6: Final answer
    x = 209,260.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.